The PM is likely to face some tough questions from Labour leader Jeremy Corbyn who blasted her this week for being “held hostage” by Tory extremists.

She is also likely to come up against criticism for the lack of detail in her speech.

Mrs May reiterated her determination to avoid going back to a hard border between Northern Ireland and the Irish Republic during the speech, but she is likely to come up against further questioning in light of Sinn Fein and the DUP meeting with Michel Barnier this week, and Taoiseach Leo Varadkar ruling out formal three-way talks between the UK, EU and Ireland.

The visit of Saudi Prince Mohammed bin Salman is due to come up, as the PM is set to have talks with the 32-year-old during his visit.

Mrs May is hoping to capitalise on the Saudi economy’s opening-up but No 10 said the PM would also express “deep concern” at the humanitarian situation in Yemen.

Charity Save the Children is demonstrating against the visit outside the Houses of Parliament today.

MPs from all parties will be wearing 50:50 Parliament pins during today’s PMQs in honour of international women’s day, which falls tomorrow.

50:50 Parliament campaigns for equal representation of men and women in parliament.